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    • 2. 发明专利
    • DISPOSABLE, CLOSED BLOOD SAMPLING SYSTEM FOR USE IN MEDICAL CONDUIT LINE
    • CA2678326A1
    • 2008-08-21
    • CA2678326
    • 2008-02-13
    • EDWARDS LIFESCIENCES CORP
    • FRAZIER JOHN AMCKEOWN MORGAN TWRIGHT MARKBAK-BOYCHUK GREG
    • A61B5/15A61M1/02A61M39/02A61M39/04
    • A disposable, closed fluid sampling system for use with a medical conduit line (70), especially for taking blood samples from a pressure monitoring l ine. The conduit line (70) has at least one fluid sampling site (100, 102) i nterposed ~ between a distal segment of tubing and a proximal segment of tub ing. The system includes a disposable subsystem (96) having a bypass cannula (110) adapted to engage the sampling site, a reservoir (112) for drawing a prime volume of fluid past the sampling site, and a fluid sampling container (114). A 3-way stopcock (116) may connect the reservoir, bypass cannula, an d sampling vessel for controlling the sampling procedure. The bypass cannula (110) may simultaneously place the subsystem into fluid communication with an inner chamber (136) of the sampling site and exclude the proximal segment of the conduit line. Alternatively, a stopcock immediately adjacent the sam pling site in the proximal segment may be utilized. A method of using the sy stem includes attaching the disposable subsystem, opening the reservoir to t he distal segment while excluding the proximal segment, drawing a prime volu me of fluid into the reservoir, opening the sampling vessel to the distal se gment and drawing a sample, re-infusing the prime volume into the distal seg ment, and removing and discarding the subsystem. The reservoir remains attac hed between the prime volume draw and re-infusion and is thus "closed."